A free library to stumble across, one of many placed worldwide if you know where to look.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This probably wasn't what Mao had in mind.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A monthly street "service" of handmade puppets and live original puppets, whose devotees profess has the power to change lives.

This icon of the Atomic Age now lays dormant.

The last street in Pittsburgh that's paved with wood.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

Resting place of Hollywood's immortals is also site of summer film screenings.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

A giant ball made from pieces of an old Jeep.

Hundreds of protractors affixed to surfaces all over the city.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.